I have some frozen meat that I would like to be able to cut while frozen so that some can be used now and the rest frozen for later use. It's to hard to cut through with a knife, so a saw would be better. I have a hacksaw but all the blades are painted. Is there a reasonably easy way to make them safe to use with food? I don't mind putting in some effort if I have a tool at the end of it that I can reuse many times. I have considered sandpaper but I think this would dull the teeth.